CN105221766A - A kind of butterfly valve with hydraulic sealing structure - Google Patents
A kind of butterfly valve with hydraulic sealing structure Download PDFInfo
- Publication number
- CN105221766A CN105221766A CN201510755607.5A CN201510755607A CN105221766A CN 105221766 A CN105221766 A CN 105221766A CN 201510755607 A CN201510755607 A CN 201510755607A CN 105221766 A CN105221766 A CN 105221766A
- Authority
- CN
- China
- Prior art keywords
- valve rod
- butterfly
- transport pipe
- butterfly plate
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2261—Shaping or arrangements of the sealing the sealing being arranged on the valve member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat
- F16K1/2266—Shaping or arrangements of the sealing the sealing being arranged on the valve seat and being forced into sealing contact with the valve member by a spring or a spring-like member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Valve Housings (AREA)
Abstract
The present invention relates to butterfly valve technical field, particularly a kind of butterfly valve with hydraulic sealing structure, the inwall of valve body is provided with the seal convexity coordinated with butterfly plate edge seal; The central part of butterfly plate is provided with hydraulic drive mechanism; The bilateral symmetry of butterfly plate is provided with chute; The sealing slide block be connected with hydraulic drive mechanism is all installed in chute; Seal convexity is provided with and the seal groove sealing slide block and coordinate.Seal convexity in the present invention in valve body is provided with the seal groove coordinated with sealing slide block, the central part of butterfly version is provided with the hydraulic drive mechanism for driving sealing skid, sealing slide block is outwards slided the sealing being inserted in seal groove and realizing valve body.Adopt the profile of the butterfly plate of the butterfly valve of this hydraulic sealing structure and seal convexity can direct casting, do not need to carry out machining, while package encapsulation effect, greatly reduce the accuracy of manufacturing requirement of butterfly valve.
Description
Technical field
The present invention relates to butterfly valve technical field, particularly a kind of butterfly valve with hydraulic sealing structure.
Background technique
The sealing of traditional butterfly valve mainly realizes by sealing between butterfly plate and the projection on valve interior wall to contact.In order to ensure sealing effect, butterfly plate is high with the requirement on machining accuracy of the profile line that projection contacts each other.And long-term time in process, there is friction and cause with protruding and wear and tear and produce gap in butterfly plate, affects sealing effect, and then cause butterfly valve to be scrapped.Therefore need to improve the sealing configuration of traditional butterfly valve, to improve sealing effect, extend the working life of butterfly valve.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of butterfly valve with hydraulic sealing structure is provided, the both wings of butterfly plate are all provided with sealing slide block, seal convexity in valve body is provided with the seal groove coordinated with sealing slide block, the central part of butterfly version is provided with the hydraulic drive mechanism for driving sealing skid, sealing slide block is outwards slided the sealing being inserted in seal groove and realizing valve body.Adopt the profile of the butterfly plate of the butterfly valve of this hydraulic sealing structure and seal convexity can direct casting, do not need to carry out machining, while package encapsulation effect, greatly reduce the accuracy of manufacturing requirement of butterfly valve.
For solving the problem, the invention provides following technological scheme:
There is a butterfly valve for hydraulic sealing structure, comprise valve body, spool, start-stop device and oil feed pump; Described spool comprises butterfly plate, upper valve rod and lower valve rod; Described valve body is provided with upper valve rod fixed cover and lower valve rod fixed cover; Described upper valve rod is located in upper valve rod fixed cover by bearing housing, and lower valve rod is located in lower valve rod fixed cover by bearing housing, and the inwall of described valve body is provided with the seal convexity coordinated with butterfly plate edge seal; The central part of described butterfly plate is provided with hydraulic drive mechanism; The bilateral symmetry of described butterfly plate is provided with chute; The sealing slide block be connected with hydraulic drive mechanism is all installed in described chute; Described seal convexity is provided with and the seal groove sealing slide block and coordinate.
Further, the central part of described butterfly plate is provided with hydraulic pressure cavity and sealing cover; Described sealing cover is installed on butterfly plate by bolt; Described hydraulic drive mechanism comprises right baffle-plate, right baffle plate, the first transport pipe, the second transport pipe and the 3rd transport pipe; Described right baffle-plate and right baffle plate to be installed in hydraulic pressure cavity and to be divided into left chamber, right chamber and intermediate cavity; Described left chamber is by the first transport pipe and butterfly plate ft connection, and right chamber is by the 3rd transport pipe and butterfly plate ft connection, and intermediate cavity is by the second transport pipe and butterfly plate ft connection; Described sealing slide block is equipped with the connecting rod extended in hydraulic pressure cavity; Described right baffle-plate and right baffle plate are all connected with a connecting rod sealed on slide block by bolt.
Further, described upper valve rod is provided with three through holes along its direction of axis line; Described butterfly plate is also provided with three through holes; Described first transport pipe, the second transport pipe and the 3rd transport pipe all through butterfly plate and upper valve rod through hole and be connected with oil feed pump.
Further, described fuel feeding delivery side of pump is provided with solenoid directional control valve; Described first transport pipe is connected with oil feed pump by solenoid directional control valve with after the 3rd transport pipe parallel connection; Described second transport pipe is connected with oil feed pump by solenoid directional control valve.
Further, the upper end of described butterfly plate is provided with upper valve rod mounting hole; The lower end of described butterfly plate is provided with lower valve rod mounting hole; Described upper valve rod mounting hole and lower valve rod mounting hole are rectangular opening; Described upper valve rod is provided with the lower joint be sheathed in upper valve rod mounting hole; Described lower valve rod is provided with the upper joint be sheathed in lower valve rod mounting hole; Described upper joint and lower joint are rectangular configuration.
Beneficial effect: a kind of butterfly valve with hydraulic sealing structure of the present invention, the both wings of butterfly plate are all provided with sealing slide block, seal convexity in valve body is provided with the seal groove coordinated with sealing slide block, the central part of butterfly version is provided with the hydraulic drive mechanism for driving sealing skid, sealing slide block is outwards slided the sealing being inserted in seal groove and realizing valve body.Adopt the profile of the butterfly plate of the butterfly valve of this hydraulic sealing structure and seal convexity can direct casting, do not need to carry out machining, while package encapsulation effect, greatly reduce the accuracy of manufacturing requirement of butterfly valve.
Accompanying drawing explanation
Fig. 1 is the perspective view of invention;
Fig. 2 is decomposition texture schematic diagram of the present invention;
Fig. 3 is the perspective cross-sectional structural representation of the valve body in the present invention;
Fig. 4 is the enlarged diagram at A place in Fig. 3;
Fig. 5 is the decomposition texture schematic diagram of the butterfly plate in the present invention;
Fig. 6 is the enlarged diagram at B place in Fig. 5;
Description of reference numerals: valve body 1, upper valve rod fixed cover 1a, lower valve rod fixed cover 1b, seal convexity 1c, seal groove 1d, butterfly plate 2, chute 2a, upper valve rod 3, lower joint 3a, lower valve rod 4, upper joint 4a, sealing slide block 5, connecting rod 5a, sealing cover 6, right baffle-plate 7, right baffle plate 8, first transport pipe 9, second transport pipe the 10, three transport pipe 11.
Embodiment
Below in conjunction with Figure of description and embodiment, specific embodiments of the invention are described in further detail:
Referring to figs. 1 through a kind of butterfly valve with hydraulic sealing structure shown in Fig. 6, comprise valve body 1, spool, start-stop device and oil feed pump; Described spool comprises butterfly plate 2, upper valve rod 3 and lower valve rod 4; Described valve body 1 is provided with upper valve rod 3 fixed cover 1a and lower valve rod 4 fixed cover 1b; Described upper valve rod 3 is located in upper valve rod fixed cover 1a by bearing housing, and lower valve rod 4 is located in lower valve rod fixed cover 1a by bearing housing, and the inwall of described valve body 1 is provided with the seal convexity 1c coordinated with butterfly plate 2 edge seal; The central part of described butterfly plate 2 is provided with hydraulic drive mechanism; The bilateral symmetry of described butterfly plate 2 is provided with chute 2a; The sealing slide block 5 be connected with hydraulic drive mechanism is all installed in described chute 2a; Described seal convexity 1c is provided with and the seal groove 1d sealing slide block 5 and coordinate.
The central part of described butterfly plate 2 is provided with hydraulic pressure cavity and sealing cover 6; Described sealing cover 6 is installed on butterfly plate 2 by bolt; Described hydraulic drive mechanism comprises right baffle-plate 7, right baffle plate 8, first transport pipe 9, second transport pipe 10 and the 3rd transport pipe 11; Described right baffle-plate 7 and right baffle plate 8 to be installed in hydraulic pressure cavity and to be divided into left chamber, right chamber and intermediate cavity; Described left chamber is by the first transport pipe 9 and butterfly plate 2 ft connection, and right chamber is by the 3rd transport pipe 11 and butterfly plate 2 ft connection, and intermediate cavity is by the second transport pipe 10 and butterfly plate 2 ft connection; Described sealing slide block 5 is equipped with the connecting rod 5a extended in hydraulic pressure cavity; Described right baffle-plate 7 and right baffle plate 8 are all connected with a connecting rod 5a sealed on slide block 5 by bolt.
Described upper valve rod 3 is provided with three through holes along its direction of axis line; Described butterfly plate 2 is also provided with three through holes; Described first transport pipe 9, second transport pipe 10 and the 3rd transport pipe 11 all through butterfly plate 2 and upper valve rod 3 through hole and be connected with oil feed pump.
Described fuel feeding delivery side of pump is provided with solenoid directional control valve; Described first transport pipe 9 is connected with oil feed pump by solenoid directional control valve with after the 3rd transport pipe 11 parallel connection; Described second transport pipe 10 is connected with oil feed pump by solenoid directional control valve.
The upper end of described butterfly plate 2 is provided with upper valve rod mounting hole; The lower end of described butterfly plate 2 is provided with lower valve rod mounting hole; Described upper valve rod mounting hole and lower valve rod mounting hole are rectangular opening; Described upper valve rod 3 is provided with the lower joint 3a be sheathed in upper valve rod mounting hole; Described lower valve rod 4 is provided with the upper joint 4a be sheathed in lower valve rod mounting hole; Described upper joint 4a and lower joint 3a is rectangular configuration.
A kind of butterfly valve with hydraulic sealing structure of the present invention, the both wings of butterfly plate 2 are all provided with sealing slide block 5, seal convexity 1c in valve body 1 is provided with the seal groove 1d coordinated with sealing slide block 5, the central part of butterfly version being provided with the hydraulic drive mechanism for driving sealing slide block 5 to slide, sealing slide block 5 outwards being slided and is inserted into the sealing realizing valve body 1 in seal groove 1d.Adopt the profile of the butterfly plate 2 of the butterfly valve of this hydraulic sealing structure and seal convexity 1c can direct casting, do not need to carry out machining, while package encapsulation effect, greatly reduce the accuracy of manufacturing requirement of butterfly valve.
What needs were said is, when after the working position that butterfly plate 2 is closed to butterfly valve at the driving lower rotary shaft of start-stop device, electromagnetic switch valve events, second transport pipe 10 road is connected with oil supply pipeline, first transport pipe 9 road is connected with oil returning tube with after the 3rd transport pipe 11 road parallel connection, now pass into high pressure oil in intermediate cavity make right baffle-plate 7 and right baffle plate 8 respectively to two lateral movements and compress left chamber and right chamber respectively, hydraulic oil in room left chamber and right chamber is back in oil feed pump by oil returning tube, meanwhile two sealing slide blocks 5 are pushed out to both sides and are inserted in seal groove 1d.
In the present invention, the sealing of valve body 1 matches with seal groove 1d by sealing slide block 5 and realizes, and does not therefore need between butterfly plate 2 with seal convexity 1c to contact.So do not need too high machining accuracy when the manufacture of butterfly plate 2 and valve body 1.Under butterfly valve closed condition, between butterfly plate 2 and seal convexity 1c, leave gap.
The above, it is only preferred embodiment of the present invention, not any restriction is made to technical scope of the present invention, thus every above embodiment is done according to technical spirit of the present invention any trickle amendment, equivalent variations and modification, all still belong in the scope of technological scheme of the present invention.
Claims (5)
1. there is a butterfly valve for hydraulic sealing structure, comprise valve body (1), spool, start-stop device and oil feed pump; Described spool comprises butterfly plate (2), upper valve rod (3) and lower valve rod (4); Described valve body (1) is provided with upper valve rod fixed cover (1a) and lower valve rod fixed cover (1b); Described upper valve rod (3) is located in upper valve rod fixed cover (1a) by bearing housing, lower valve rod (4) is located in lower valve rod fixed cover (1b) by bearing housing, it is characterized in that: the inwall of described valve body (1) is provided with the seal convexity (1c) coordinated with butterfly plate (2) edge seal; The central part of described butterfly plate (2) is provided with hydraulic drive mechanism; The bilateral symmetry of described butterfly plate (2) is provided with chute (2a); The sealing slide block (5) be connected with hydraulic drive mechanism is all installed in described chute (2a); Described seal convexity (1c) is provided with and the seal groove (1d) sealing slide block (5) and coordinate.
2. a kind of butterfly valve with hydraulic sealing structure according to claim 1, is characterized in that: the central part of described butterfly plate (2) is provided with hydraulic pressure cavity and sealing cover (6); Described sealing cover (6) is installed on butterfly plate (2) by bolt; Described hydraulic drive mechanism comprises right baffle-plate (7), right baffle plate (8), the first transport pipe (9), the second transport pipe (10) and the 3rd transport pipe (11); Described right baffle-plate (7) and right baffle plate (8) to be installed in hydraulic pressure cavity and to be divided into left chamber, right chamber and intermediate cavity; Described left chamber is by the first transport pipe (9) and butterfly plate (2) ft connection, right chamber is by the 3rd transport pipe (11) and butterfly plate (2) ft connection, and intermediate cavity is by the second transport pipe (10) and butterfly plate (2) ft connection; Described sealing slide block (5) is equipped with the connecting rod (5a) extended in hydraulic pressure cavity; Described right baffle-plate (7) and right baffle plate (8) are all connected with a connecting rod (5a) sealed on slide block (5) by bolt.
3. a kind of butterfly valve with hydraulic sealing structure according to claim 2, is characterized in that: described upper valve rod (3) is provided with three through holes along its direction of axis line; Described butterfly plate (2) is also provided with three through holes; Described first transport pipe (9), the second transport pipe (10) and the 3rd transport pipe (11) all through butterfly plate (2) and upper valve rod (3) through hole and be connected with oil feed pump.
4. a kind of butterfly valve with hydraulic sealing structure according to claim 3, is characterized in that: described fuel feeding delivery side of pump is provided with solenoid directional control valve; Described first transport pipe (9) is connected with oil feed pump by solenoid directional control valve with after the 3rd transport pipe (11) parallel connection; Described second transport pipe (10) is connected with oil feed pump by solenoid directional control valve.
5. a kind of butterfly valve with hydraulic sealing structure according to claim 1, is characterized in that: the upper end of described butterfly plate (2) is provided with upper valve rod mounting hole; The lower end of described butterfly plate (2) is provided with lower valve rod mounting hole; Described upper valve rod mounting hole and lower valve rod mounting hole are rectangular opening; Described upper valve rod (3) is provided with the lower joint (3a) be sheathed in upper valve rod mounting hole; Described lower valve rod (4) is provided with the upper joint (4a) be sheathed in lower valve rod mounting hole; Described upper joint (4a) and lower joint (3a) are rectangular configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510755607.5A CN105221766B (en) | 2015-11-09 | 2015-11-09 | A kind of butterfly valve with hydraulic sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510755607.5A CN105221766B (en) | 2015-11-09 | 2015-11-09 | A kind of butterfly valve with hydraulic sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105221766A true CN105221766A (en) | 2016-01-06 |
| CN105221766B CN105221766B (en) | 2017-06-23 |
Family
ID=54990904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510755607.5A Active CN105221766B (en) | 2015-11-09 | 2015-11-09 | A kind of butterfly valve with hydraulic sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105221766B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58149474A (en) * | 1982-02-27 | 1983-09-05 | Tomoe Gijutsu Kenkyusho:Kk | Sealing mechanism for eccentric-type butterfly valve |
| CN2851749Y (en) * | 2005-09-30 | 2006-12-27 | 刘工勤 | Seal arrangement of butterfly valve |
| CN101162052A (en) * | 2007-11-23 | 2008-04-16 | 河北工业大学 | Non-abrasion hard-sealing butterfly valve |
| CN102691802A (en) * | 2012-06-11 | 2012-09-26 | 格朗富（苏州）集团有限公司 | Processing method of butterfly valve sealing mechanism |
| CN104295754A (en) * | 2014-09-09 | 2015-01-21 | 江苏远望仪器有限公司 | Butterfly valve with hydraulic seal structure |
| CN204459195U (en) * | 2014-11-27 | 2015-07-08 | 上海冠龙阀门机械有限公司 | The hard seal butterfly valve that a kind of Double-clack is board-like |
-
2015
- 2015-11-09 CN CN201510755607.5A patent/CN105221766B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58149474A (en) * | 1982-02-27 | 1983-09-05 | Tomoe Gijutsu Kenkyusho:Kk | Sealing mechanism for eccentric-type butterfly valve |
| CN2851749Y (en) * | 2005-09-30 | 2006-12-27 | 刘工勤 | Seal arrangement of butterfly valve |
| CN101162052A (en) * | 2007-11-23 | 2008-04-16 | 河北工业大学 | Non-abrasion hard-sealing butterfly valve |
| CN102691802A (en) * | 2012-06-11 | 2012-09-26 | 格朗富（苏州）集团有限公司 | Processing method of butterfly valve sealing mechanism |
| CN104295754A (en) * | 2014-09-09 | 2015-01-21 | 江苏远望仪器有限公司 | Butterfly valve with hydraulic seal structure |
| CN204459195U (en) * | 2014-11-27 | 2015-07-08 | 上海冠龙阀门机械有限公司 | The hard seal butterfly valve that a kind of Double-clack is board-like |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105221766B (en) | 2017-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104117589A (en) | Automatic-lubricating drawing die | |
| CN103697197B (en) | The two-way intercommunication two-position two-way solenoid valve of inner guide | |
| CN105221766A (en) | A kind of butterfly valve with hydraulic sealing structure | |
| CN203655787U (en) | Travel limiting valve for dumper | |
| CN201007295Y (en) | Wet-type electromagnetic direction changing valve | |
| CN204512485U (en) | Pneumatic vacuum push-pull valve | |
| CN204985935U (en) | Gerotor type electromagnetism three -way valve | |
| CN204042143U (en) | A kind of solenoid electric valve | |
| CN203627378U (en) | Decompression valve for lift cylinder of bulldozer | |
| CN203176435U (en) | Electromagnetic throttling valve | |
| CN103759030A (en) | Electric brake valve used for stock bin | |
| CN203614482U (en) | Stacked bidirectional-unidirectional throttling valve | |
| CN102900850A (en) | 502 glue filling control valve | |
| CN203640948U (en) | Concrete pump truck pumping system | |
| CN204921516U (en) | Compound die oil circuit is in block to be put | |
| CN205036666U (en) | Hydraulic pressure keeps electro -hydraulic reversing valve of valve position | |
| CN201269232Y (en) | Combined multipath reversing solenoid valve | |
| CN204629050U (en) | The long-term automatic filling device of a kind of long-range lubricating grease | |
| CN203516773U (en) | Stop valve with pilot valve | |
| CN102865264B (en) | A kind of hydrovalve and hydraulic valve bank | |
| CN203082265U (en) | Machine combination magnetic valve | |
| CN201916267U (en) | Bonnet projection type hydraulic cartridge valve | |
| CN204041144U (en) | A kind of solenoid electric valve for motor VVT system | |
| WO2019056842A1 (en) | Integrated rotary cylinder | |
| CN204042117U (en) | 20 tons of excavator hydraulic main valve foundry goods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A butterfly valve with hydraulic sealing structure Effective date of registration: 20220719 Granted publication date: 20170623 Pledgee: Bank of Communications Co.,Ltd. Ningbo Fenghua sub branch Pledgor: NINGBO VALVE MANUFACTURING Co.,Ltd. Registration number: Y2022330001279 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230518 Granted publication date: 20170623 Pledgee: Bank of Communications Co.,Ltd. Ningbo Fenghua sub branch Pledgor: NINGBO VALVE MANUFACTURING Co.,Ltd. Registration number: Y2022330001279 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |